SKF 7028ACD/HCP4AL Angular contact ball bearings,SKF 7028 ACD/HCP4AL Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7028 ACD/HCP4AL

7028 ACD/HCP4AL

Dimensions
d 140mm
D 210mm
B 33mm
d1 161.6mm
d2 161.6mm
D1 188.4mm
b 3.1mm
C1 17.9mm
C2 6.6mm
C3 5.6mm
r1,2min.2mm
r3,4min.1mm
a 57.5mm
Abutment dimensions
damin.149mm
dbmin.149mm
Damax.201mm
Dbmax.205mm
ramax.2mm
rbmax.1mm
dn 166.3mm
Calculation data
Basic dynamic load ratingC 146kN
Basic static load ratingC0 156kN
Fatigue load limitPu 5.1kN
Attainable speed for grease lubrication  7000r/min
Attainable speed for oil-air lubrication  11000r/min
Ball diameterDw 22.225mm
Number of ballsz 22 
Reference grease quantityGref 45cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 900N
Static axial stiffness, preload class A  404N/µm
Preload class BGB 1800N
Static axial stiffness, preload class B  530N/µm
Preload class CGC 3600N
Static axial stiffness, preload class C  702N/µm
Preload class DGD 7200N
Static axial stiffness, preload class D  950N/µm
Calculation factors
Calculation factorf 1.16 
Calculation factorf1 0.99 
Calculation factorf2A 1 
Calculation factorf2B 1.02 
Calculation factorf2C 1.05 
Calculation factorf2D 1.08 
Calculation factorfHC 1.02 
Calculation factore 0.68 
Calculation factor (single, tandem)Y2 0.87 
Calculation factor (single, tandem)Y0 0.38 
Calculation factor (single, tandem)X2 0.41 
Calculation factor (back-to-back, face-to-face)Y1 0.92 
Calculation factor (back-to-back, face-to-face)Y2 1.41 
Calculation factor (back-to-back, face-to-face)Y0 0.76 
Calculation factor (back-to-back, face-to-face)X2 0.67 
Mass
Mass bearing  2.83kg
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Hot number: 17261 17284 25x35x7 CRW1 V 32064T220 X/DB 408303 6203-2Z/VA201 NCF 2926 CV NJ 2309 ECML P 3/4 FM PCM 15015560 M PCM 160165100 E QJ 317 N2MA RNU 209 ECJ S71916 CE/HCP4A WS 81248

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